Hindered-settling studies

Hindered-settling studies [120] with Th02 slurries having yield-stress characterization constants, fcs, from 50 to 500, in containers having diameters from 1.6 to 10.25 cm, showed that for containers having depth greater than six times the diameter, the onset of compaction was a function of the... 

When the particles are close together, hindered settling occurs. Hindered settling has been studied by many authors [6]. In all cases. 

This frequency is applicable to the study of differential sedimentation of dilute suspensions. If the population density is high enough for the effects of hindered settling to be important, then, following the approach in hy-... 

The Sn2 path alternatives need to be explored next. An Sn2 attack on a tertiary center is too hindered to proceed and can be ruled out. The Sn2 attack on the CH2 is reasonable and must be considered. In fact, it took a mechanistic study with 0-labeled water to settle this SnI vs. Sn2 question. The product with 0 attached to the CH2 group was not seen, ruling out the Sn2 mechanism. Therefore the best route is the Dn step to give the tertiary carbocation. 

Consider now a bidisperse emulsion, distributed uniformly in a layer between parallel horizontal planes z = 0 and z = H at the initial moment. The vertical z-axis is directed parallel to gravity. The initial volume concentrations of drops are small (Wio 1 and W20 1), so the hindered character of sedimentation can be neglected. After a certain time, all large drops of kind 1 will settle. We can select a column of a unit cross section in the emulsion volume and ask how many small drops will remain inside this column. A similar problem is of interest in laboratory studies on how the electric field affects the emulsion sedimentation rate. 

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